What are the differences between database DDL and DML

Differences beween DDL (Data Definition Language) and DML (Data Manipulation Language)

Data Definition Language (DDL) statements are used to define the database structure or schema.
Data Manipulation Language (DML) statements are used for managing data within schema objects.

References:
http://www.orafaq.com/faq/what_are_the_difference_between_ddl_dml_and_dcl_commands